Now that Lissandra has a new Bio, how about looking at giving her a new passive?
Right now, the only champions left with mana boosting passives are
and
, as
is being updated, and
was changed a while ago
Although mana sustain passives are bland and boring, i feel like Xerath's passive actually feels impactful, but Lissandra's doesn't I could just make this post as a call to action for Riot to change her passive, but I'd much rather make this post a list of suggestions for a new passive
IMO, I would like a passive that makes use of her auto attacks, but still feels different than a 
My suggestion is:
First: Reduce her Q damage (considerably), but make the slow more impactful (not single target) Although reducing the damage on her only consistent damage ability may seem stupid, that's where the passive comes in. In addition to this, Lissandra is losing the mana gain on her passive, so reducing the Q mana cost would also be ideal
Passive: 0.75 seconds after using a Q, Lissandra's next basic attack will fire an ice shard, (dealing damage equal to the damage that she lost on her Q), and pierces through all enemies it passes through.
I would like for this to be like
R, where it can be dodged with quick movements (or
), but is fast and easy to hit at close range (as the travel distance is shorter), but more inaccurate at max attack range
I feel like this will give Lissandra's kit more depth, as she now doesn't just EWRQ in teamfights, and her consistent damage is no longer as simple as pressing Q over and over again.